git.sur5r.net Git - openldap/blob - servers/slapd/controls.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2005 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19
  20 #include <ac/string.h>
  21 #include <ac/socket.h>
  22
  23 #include "slap.h"
  24
  25 #include "../../libraries/liblber/lber-int.h"
  26
  27 static SLAP_CTRL_PARSE_FN parseAssert;
  28 static SLAP_CTRL_PARSE_FN parsePreRead;
  29 static SLAP_CTRL_PARSE_FN parsePostRead;
  30 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  31 #ifdef LDAP_DEVEL
  32 static SLAP_CTRL_PARSE_FN parseManageDIT;
  33 #endif
  34 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  35 static SLAP_CTRL_PARSE_FN parseModifyIncrement;
  36 static SLAP_CTRL_PARSE_FN parseNoOp;
  37 static SLAP_CTRL_PARSE_FN parsePagedResults;
  38 #ifdef LDAP_DEVEL
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  42 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  43 static SLAP_CTRL_PARSE_FN parseDomainScope;
  44 #ifdef SLAP_CONTROL_X_TREE_DELETE
  45 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  46 #endif
  47 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  48 static SLAP_CTRL_PARSE_FN parseSubentries;
  49
  50 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  51
  52 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  53 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  54
  55 struct slap_control_ids slap_cids;
  56
  57 struct slap_control {
  58         /* Control OID */
  59         char *sc_oid;
  60
  61         /* The controlID for this control */
  62         int sc_cid;
  63
  64         /* Operations supported by control */
  65         slap_mask_t sc_mask;
  66
  67         /* Extended operations supported by control */
  68         char **sc_extendedops;
  69
  70         /* Control parsing callback */
  71         SLAP_CTRL_PARSE_FN *sc_parse;
  72
  73         LDAP_SLIST_ENTRY(slap_control) sc_next;
  74 };
  75
  76 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  77         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  78
  79 /*
  80  * all known request control OIDs should be added to this list
  81  */
  82 /*
  83  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  84  * addresses an undefined control; this allows to safely test for
  85  * well known controls even if they are not registered, e.g. if
  86  * they get moved to modules.  An example is sc_LDAPsync, which
  87  * is implemented in the syncprov overlay and thus, if configured
  88  * as dynamic module, may not be registered.  One side effect is that
  89  * slap_known_controls[0] == NULL, so it should always be used
  90  * starting from 1.
  91  * FIXME: should we define the "undefined control" oid?
  92  */
  93 char *slap_known_controls[SLAP_MAX_CIDS+1];
  94 static int num_known_controls = 1;
  95
  96 static char *proxy_authz_extops[] = {
  97         LDAP_EXOP_MODIFY_PASSWD,
  98         LDAP_EXOP_X_WHO_AM_I,
  99         NULL
 100 };
 101
 102 static struct slap_control control_defs[] = {
 103         {  LDAP_CONTROL_ASSERT,
 104                 (int)offsetof(struct slap_control_ids, sc_assert),
 105                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 106                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 107         { LDAP_CONTROL_PRE_READ,
 108                 (int)offsetof(struct slap_control_ids, sc_preRead),
 109                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 110                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 111         { LDAP_CONTROL_POST_READ,
 112                 (int)offsetof(struct slap_control_ids, sc_postRead),
 113                 SLAP_CTRL_HIDE|SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 114                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 115         { LDAP_CONTROL_VALUESRETURNFILTER,
 116                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 117                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 118                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 119         { LDAP_CONTROL_PAGEDRESULTS,
 120                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 121                 SLAP_CTRL_SEARCH, NULL,
 122                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 123 #ifdef LDAP_DEVEL
 124         { LDAP_CONTROL_SORTREQUEST,
 125                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 126                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE, NULL,
 127                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 128 #endif
 129 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
 130         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 131                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 132                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 133                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 134 #endif
 135 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 136         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 137                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 138                 SLAP_CTRL_MODIFY, NULL,
 139                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 140 #endif
 141 #ifdef SLAP_CONTROL_X_TREE_DELETE
 142         { LDAP_CONTROL_X_TREE_DELETE,
 143                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 144                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE, NULL,
 145                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 146 #endif
 147 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
 148         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 149                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 150                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 151                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 152 #endif
 153 #ifdef LDAP_CONTROL_SUBENTRIES
 154         { LDAP_CONTROL_SUBENTRIES,
 155                 (int)offsetof(struct slap_control_ids, sc_subentries),
 156                 SLAP_CTRL_SEARCH, NULL,
 157                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 158 #endif
 159         { LDAP_CONTROL_NOOP,
 160                 (int)offsetof(struct slap_control_ids, sc_noOp),
 161                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 162                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 163 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 164         { LDAP_CONTROL_MODIFY_INCREMENT,
 165                 (int)offsetof(struct slap_control_ids, sc_modifyIncrement),
 166                 SLAP_CTRL_HIDE|SLAP_CTRL_MODIFY, NULL,
 167                 parseModifyIncrement, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 168 #endif
 169 #ifdef LDAP_DEVEL
 170         { LDAP_CONTROL_MANAGEDIT,
 171                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 172                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE, NULL,
 173                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 174 #endif
 175         { LDAP_CONTROL_MANAGEDSAIT,
 176                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 177                 SLAP_CTRL_ACCESS, NULL,
 178                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 179         { LDAP_CONTROL_PROXY_AUTHZ,
 180                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 181                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS, proxy_authz_extops,
 182                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 183         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 184 };
 185
 186 /*
 187  * Register a supported control.
 188  *
 189  * This can be called by an OpenLDAP plugin or, indirectly, by a
 190  * SLAPI plugin calling slapi_register_supported_control().
 191  */
 192 int
 193 register_supported_control(const char *controloid,
 194         slap_mask_t controlmask,
 195         char **controlexops,
 196         SLAP_CTRL_PARSE_FN *controlparsefn,
 197         int *controlcid)
 198 {
 199         struct slap_control *sc;
 200         int i;
 201
 202         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 203                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 204                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 205                 SLAP_MAX_CIDS, 0, 0 );
 206                 return LDAP_OTHER;
 207         }
 208
 209         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 210
 211         /* sanity check - should never happen */
 212         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 213                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 214                         Debug( LDAP_DEBUG_ANY,
 215                                 "Control %s already registered.\n",
 216                                 controloid, 0, 0 );
 217                         return LDAP_PARAM_ERROR;
 218                 }
 219         }
 220
 221         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 222         if ( sc == NULL ) return LDAP_NO_MEMORY;
 223
 224         sc->sc_oid = ch_strdup( controloid );
 225         sc->sc_mask = controlmask;
 226         if ( controlexops != NULL ) {
 227                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 228                 if ( sc->sc_extendedops == NULL ) {
 229                         ch_free( sc );
 230                         return LDAP_NO_MEMORY;
 231                 }
 232         } else {
 233                 sc->sc_extendedops = NULL;
 234         }
 235         sc->sc_parse = controlparsefn;
 236
 237         if ( controlcid ) *controlcid = num_known_controls;
 238         sc->sc_cid = num_known_controls;
 239
 240         /* Update slap_known_controls, too. */
 241         slap_known_controls[num_known_controls-1] = sc->sc_oid;
 242         slap_known_controls[num_known_controls++] = NULL;
 243
 244         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 245         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 246         return LDAP_SUCCESS;
 247 }
 248
 249 /*
 250  * One-time initialization of internal controls.
 251  */
 252 int
 253 slap_controls_init( void )
 254 {
 255         int i, rc;
 256         struct slap_control *sc;
 257
 258         rc = LDAP_SUCCESS;
 259
 260         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 261                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 262                 rc = register_supported_control( control_defs[i].sc_oid,
 263                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 264                         control_defs[i].sc_parse, cid );
 265                 if ( rc != LDAP_SUCCESS ) break;
 266         }
 267
 268         return rc;
 269 }
 270
 271 /*
 272  * Free memory associated with list of supported controls.
 273  */
 274 void
 275 controls_destroy( void )
 276 {
 277         struct slap_control *sc;
 278
 279         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 280                 sc = LDAP_SLIST_FIRST(&controls_list);
 281                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 282
 283                 ch_free( sc->sc_oid );
 284                 if ( sc->sc_extendedops != NULL ) {
 285                         ldap_charray_free( sc->sc_extendedops );
 286                 }
 287                 ch_free( sc );
 288         }
 289 }
 290
 291 /*
 292  * Format the supportedControl attribute of the root DSE,
 293  * detailing which controls are supported by the directory
 294  * server.
 295  */
 296 int
 297 controls_root_dse_info( Entry *e )
 298 {
 299         AttributeDescription *ad_supportedControl
 300                 = slap_schema.si_ad_supportedControl;
 301         struct berval vals[2];
 302         struct slap_control *sc;
 303
 304         vals[1].bv_val = NULL;
 305         vals[1].bv_len = 0;
 306
 307         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 308                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 309
 310                 vals[0].bv_val = sc->sc_oid;
 311                 vals[0].bv_len = strlen( sc->sc_oid );
 312
 313                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 314                         return -1;
 315                 }
 316         }
 317
 318         return 0;
 319 }
 320
 321 /*
 322  * Return a list of OIDs and operation masks for supported
 323  * controls. Used by SLAPI.
 324  */
 325 int
 326 get_supported_controls(char ***ctrloidsp,
 327         slap_mask_t **ctrlmasks)
 328 {
 329         int i, n;
 330         char **oids;
 331         slap_mask_t *masks;
 332         int rc;
 333         struct slap_control *sc;
 334
 335         n = 0;
 336
 337         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 338                 n++;
 339         }
 340
 341         if ( n == 0 ) {
 342                 *ctrloidsp = NULL;
 343                 *ctrlmasks = NULL;
 344                 return LDAP_SUCCESS;
 345         }
 346
 347         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 348         if ( oids == NULL ) {
 349                 return LDAP_NO_MEMORY;
 350         }
 351         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 352         if  ( masks == NULL ) {
 353                 ch_free( oids );
 354                 return LDAP_NO_MEMORY;
 355         }
 356
 357         n = 0;
 358
 359         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 360                 oids[n] = ch_strdup( sc->sc_oid );
 361                 masks[n] = sc->sc_mask;
 362                 n++;
 363         }
 364         oids[n] = NULL;
 365         masks[n] = 0;
 366
 367         *ctrloidsp = oids;
 368         *ctrlmasks = masks;
 369
 370         return LDAP_SUCCESS;
 371 }
 372
 373 /*
 374  * Find a control given its OID.
 375  */
 376 static struct slap_control *
 377 find_ctrl( const char *oid )
 378 {
 379         struct slap_control *sc;
 380
 381         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 382                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 383                         return sc;
 384                 }
 385         }
 386
 387         return NULL;
 388 }
 389
 390 int
 391 slap_find_control_id(
 392         const char *oid,
 393         int *cid )
 394 {
 395         struct slap_control *ctrl = find_ctrl( oid );
 396         if ( ctrl ) {
 397                 if ( cid ) *cid = ctrl->sc_cid;
 398                 return LDAP_SUCCESS;
 399         }
 400         return LDAP_CONTROL_NOT_FOUND;
 401 }
 402
 403 int
 404 slap_global_control( Operation *op, const char *oid, int *cid )
 405 {
 406         struct slap_control *ctrl = find_ctrl( oid );
 407
 408         if ( ctrl == NULL ) {
 409                 /* should not be reachable */
 410                 Debug( LDAP_DEBUG_ANY,
 411                         "slap_global_control: unrecognized control: %s\n",
 412                         oid, 0, 0 );
 413                 return LDAP_CONTROL_NOT_FOUND;
 414         }
 415
 416         if ( cid ) *cid = ctrl->sc_cid;
 417
 418         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 419                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 420                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 421         {
 422                 return LDAP_COMPARE_TRUE;
 423         }
 424
 425         Debug( LDAP_DEBUG_TRACE,
 426                 "slap_global_control: unavailable control: %s\n",
 427                 oid, 0, 0 );
 428
 429         return LDAP_COMPARE_FALSE;
 430 }
 431
 432 void slap_free_ctrls(
 433         Operation *op,
 434         LDAPControl **ctrls )
 435 {
 436         int i;
 437
 438         for (i=0; ctrls[i]; i++) {
 439                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 440         }
 441         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 442 }
 443
 444 int get_ctrls(
 445         Operation *op,
 446         SlapReply *rs,
 447         int sendres )
 448 {
 449         int nctrls = 0;
 450         ber_tag_t tag;
 451         ber_len_t len;
 452         char *opaque;
 453         BerElement *ber = op->o_ber;
 454         struct slap_control *sc;
 455         struct berval bv;
 456
 457         len = ber_pvt_ber_remaining(ber);
 458
 459         if( len == 0) {
 460                 /* no controls */
 461                 rs->sr_err = LDAP_SUCCESS;
 462                 return rs->sr_err;
 463         }
 464
 465         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 466                 if( tag == LBER_ERROR ) {
 467                         rs->sr_err = SLAPD_DISCONNECT;
 468                         rs->sr_text = "unexpected data in PDU";
 469                 }
 470
 471                 goto return_results;
 472         }
 473
 474         Debug( LDAP_DEBUG_TRACE,
 475                 "=> get_ctrls\n", 0, 0, 0 );
 476
 477         if( op->o_protocol < LDAP_VERSION3 ) {
 478                 rs->sr_err = SLAPD_DISCONNECT;
 479                 rs->sr_text = "controls require LDAPv3";
 480                 goto return_results;
 481         }
 482
 483         /* one for first control, one for termination */
 484         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 485
 486 #if 0
 487         if( op->ctrls == NULL ) {
 488                 rs->sr_err = LDAP_NO_MEMORY;
 489                 rs->sr_text = "no memory";
 490                 goto return_results;
 491         }
 492 #endif
 493
 494         op->o_ctrls[nctrls] = NULL;
 495
 496         /* step through each element */
 497         for( tag = ber_first_element( ber, &len, &opaque );
 498                 tag != LBER_ERROR;
 499                 tag = ber_next_element( ber, &len, opaque ) )
 500         {
 501                 LDAPControl *c;
 502                 LDAPControl **tctrls;
 503
 504                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 505                 memset(c, 0, sizeof(LDAPControl));
 506
 507                 /* allocate pointer space for current controls (nctrls)
 508                  * + this control + extra NULL
 509                  */
 510                 tctrls = op->o_tmprealloc( op->o_ctrls,
 511                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 512
 513 #if 0
 514                 if( tctrls == NULL ) {
 515                         ch_free( c );
 516                         ldap_controls_free(op->o_ctrls);
 517                         op->o_ctrls = NULL;
 518
 519                         rs->sr_err = LDAP_NO_MEMORY;
 520                         rs->sr_text = "no memory";
 521                         goto return_results;
 522                 }
 523 #endif
 524                 op->o_ctrls = tctrls;
 525
 526                 op->o_ctrls[nctrls++] = c;
 527                 op->o_ctrls[nctrls] = NULL;
 528
 529                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 530                 c->ldctl_oid = bv.bv_val;
 531
 532                 if( tag == LBER_ERROR ) {
 533                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 534                                 0, 0, 0 );
 535
 536                         slap_free_ctrls( op, op->o_ctrls );
 537                         op->o_ctrls = NULL;
 538                         rs->sr_err = SLAPD_DISCONNECT;
 539                         rs->sr_text = "decoding controls error";
 540                         goto return_results;
 541
 542                 } else if( c->ldctl_oid == NULL ) {
 543                         Debug( LDAP_DEBUG_TRACE,
 544                                 "get_ctrls: conn %lu got emtpy OID.\n",
 545                                 op->o_connid, 0, 0 );
 546
 547                         slap_free_ctrls( op, op->o_ctrls );
 548                         op->o_ctrls = NULL;
 549                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 550                         rs->sr_text = "OID field is empty";
 551                         goto return_results;
 552                 }
 553
 554                 tag = ber_peek_tag( ber, &len );
 555
 556                 if( tag == LBER_BOOLEAN ) {
 557                         ber_int_t crit;
 558                         tag = ber_scanf( ber, "b", &crit );
 559
 560                         if( tag == LBER_ERROR ) {
 561                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 562                                         0, 0, 0 );
 563                                 slap_free_ctrls( op, op->o_ctrls );
 564                                 op->o_ctrls = NULL;
 565                                 rs->sr_err = SLAPD_DISCONNECT;
 566                                 rs->sr_text = "decoding controls error";
 567                                 goto return_results;
 568                         }
 569
 570                         c->ldctl_iscritical = (crit != 0);
 571                         tag = ber_peek_tag( ber, &len );
 572                 }
 573
 574                 if( tag == LBER_OCTETSTRING ) {
 575                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 576
 577                         if( tag == LBER_ERROR ) {
 578                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 579                                         "%s (%scritical): get value failed.\n",
 580                                         op->o_connid, c->ldctl_oid,
 581                                         c->ldctl_iscritical ? "" : "non" );
 582                                 slap_free_ctrls( op, op->o_ctrls );
 583                                 op->o_ctrls = NULL;
 584                                 rs->sr_err = SLAPD_DISCONNECT;
 585                                 rs->sr_text = "decoding controls error";
 586                                 goto return_results;
 587                         }
 588                 }
 589
 590                 Debug( LDAP_DEBUG_TRACE,
 591                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 592                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 593
 594                 sc = find_ctrl( c->ldctl_oid );
 595                 if( sc != NULL ) {
 596                         /* recognized control */
 597                         slap_mask_t tagmask;
 598                         switch( op->o_tag ) {
 599                         case LDAP_REQ_ADD:
 600                                 tagmask = SLAP_CTRL_ADD;
 601                                 break;
 602                         case LDAP_REQ_BIND:
 603                                 tagmask = SLAP_CTRL_BIND;
 604                                 break;
 605                         case LDAP_REQ_COMPARE:
 606                                 tagmask = SLAP_CTRL_COMPARE;
 607                                 break;
 608                         case LDAP_REQ_DELETE:
 609                                 tagmask = SLAP_CTRL_DELETE;
 610                                 break;
 611                         case LDAP_REQ_MODIFY:
 612                                 tagmask = SLAP_CTRL_MODIFY;
 613                                 break;
 614                         case LDAP_REQ_RENAME:
 615                                 tagmask = SLAP_CTRL_RENAME;
 616                                 break;
 617                         case LDAP_REQ_SEARCH:
 618                                 tagmask = SLAP_CTRL_SEARCH;
 619                                 break;
 620                         case LDAP_REQ_UNBIND:
 621                                 tagmask = SLAP_CTRL_UNBIND;
 622                                 break;
 623                         case LDAP_REQ_ABANDON:
 624                                 tagmask = SLAP_CTRL_ABANDON;
 625                                 break;
 626                         case LDAP_REQ_EXTENDED:
 627                                 tagmask=~0L;
 628                                 assert( op->ore_reqoid.bv_val != NULL );
 629                                 if( sc->sc_extendedops != NULL ) {
 630                                         int i;
 631                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 632                                                 if( strcmp( op->ore_reqoid.bv_val,
 633                                                         sc->sc_extendedops[i] ) == 0 )
 634                                                 {
 635                                                         tagmask=0L;
 636                                                         break;
 637                                                 }
 638                                         }
 639                                 }
 640                                 break;
 641                         default:
 642                                 rs->sr_err = LDAP_OTHER;
 643                                 rs->sr_text = "controls internal error";
 644                                 goto return_results;
 645                         }
 646
 647                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 648                                 /* available extension */
 649                                 int     rc;
 650
 651                                 if( !sc->sc_parse ) {
 652                                         rs->sr_err = LDAP_OTHER;
 653                                         rs->sr_text = "not yet implemented";
 654                                         goto return_results;
 655                                 }
 656
 657                                 rc = sc->sc_parse( op, rs, c );
 658                                 if ( rc ) {
 659                                         assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 660                                         rs->sr_err = rc;
 661                                         goto return_results;
 662                                 }
 663
 664                         } else if( c->ldctl_iscritical ) {
 665                                 /* unavailable CRITICAL control */
 666                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 667                                 rs->sr_text = "critical extension is unavailable";
 668                                 goto return_results;
 669                         }
 670
 671                 } else if( c->ldctl_iscritical ) {
 672                         /* unrecognized CRITICAL control */
 673                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 674                         rs->sr_text = "critical extension is not recognized";
 675                         goto return_results;
 676                 }
 677 next_ctrl:;
 678         }
 679
 680 return_results:
 681         Debug( LDAP_DEBUG_TRACE,
 682                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 683                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 684
 685         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 686                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 687                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 688                         send_ldap_disconnect( op, rs );
 689                         rs->sr_err = SLAPD_DISCONNECT;
 690                 } else {
 691                         send_ldap_result( op, rs );
 692                 }
 693         }
 694
 695         return rs->sr_err;
 696 }
 697
 698 static int parseModifyIncrement (
 699         Operation *op,
 700         SlapReply *rs,
 701         LDAPControl *ctrl )
 702 {
 703 #if 0
 704         if ( op->o_modifyIncrement != SLAP_CONTROL_NONE ) {
 705                 rs->sr_text = "modifyIncrement control specified multiple times";
 706                 return LDAP_PROTOCOL_ERROR;
 707         }
 708 #endif
 709
 710         if ( ctrl->ldctl_value.bv_len ) {
 711                 rs->sr_text = "modifyIncrement control value not empty";
 712                 return LDAP_PROTOCOL_ERROR;
 713         }
 714
 715 #if 0
 716         op->o_modifyIncrement = ctrl->ldctl_iscritical
 717                 ? SLAP_CONTROL_CRITICAL
 718                 : SLAP_CONTROL_NONCRITICAL;
 719 #endif
 720
 721         return LDAP_SUCCESS;
 722 }
 723
 724 #ifdef LDAP_DEVEL
 725 static int parseManageDIT (
 726         Operation *op,
 727         SlapReply *rs,
 728         LDAPControl *ctrl )
 729 {
 730         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 731                 rs->sr_text = "manageDIT control specified multiple times";
 732                 return LDAP_PROTOCOL_ERROR;
 733         }
 734
 735         if ( ctrl->ldctl_value.bv_len ) {
 736                 rs->sr_text = "manageDIT control value not empty";
 737                 return LDAP_PROTOCOL_ERROR;
 738         }
 739
 740         op->o_managedit = ctrl->ldctl_iscritical
 741                 ? SLAP_CONTROL_CRITICAL
 742                 : SLAP_CONTROL_NONCRITICAL;
 743
 744         return LDAP_SUCCESS;
 745 }
 746 #endif
 747
 748 static int parseManageDSAit (
 749         Operation *op,
 750         SlapReply *rs,
 751         LDAPControl *ctrl )
 752 {
 753         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 754                 rs->sr_text = "manageDSAit control specified multiple times";
 755                 return LDAP_PROTOCOL_ERROR;
 756         }
 757
 758         if ( ctrl->ldctl_value.bv_len ) {
 759                 rs->sr_text = "manageDSAit control value not empty";
 760                 return LDAP_PROTOCOL_ERROR;
 761         }
 762
 763         op->o_managedsait = ctrl->ldctl_iscritical
 764                 ? SLAP_CONTROL_CRITICAL
 765                 : SLAP_CONTROL_NONCRITICAL;
 766
 767         return LDAP_SUCCESS;
 768 }
 769
 770 static int parseProxyAuthz (
 771         Operation *op,
 772         SlapReply *rs,
 773         LDAPControl *ctrl )
 774 {
 775         int             rc;
 776         struct berval   dn = BER_BVNULL;
 777
 778         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 779                 rs->sr_text = "proxy authorization control specified multiple times";
 780                 return LDAP_PROTOCOL_ERROR;
 781         }
 782
 783         op->o_proxy_authz = ctrl->ldctl_iscritical
 784                 ? SLAP_CONTROL_CRITICAL
 785                 : SLAP_CONTROL_NONCRITICAL;
 786
 787         Debug( LDAP_DEBUG_ARGS,
 788                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 789                 op->o_connid,
 790                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 791                 0 );
 792
 793         if ( ctrl->ldctl_value.bv_len == 0 ) {
 794                 Debug( LDAP_DEBUG_TRACE,
 795                         "parseProxyAuthz: conn=%lu anonymous\n",
 796                         op->o_connid, 0, 0 );
 797
 798                 /* anonymous */
 799                 op->o_ndn.bv_val[ 0 ] = '\0';
 800                 op->o_ndn.bv_len = 0;
 801
 802                 op->o_dn.bv_val[ 0 ] = '\0';
 803                 op->o_dn.bv_len = 0;
 804
 805                 return LDAP_SUCCESS;
 806         }
 807
 808         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 809                         NULL, &dn, SLAP_GETDN_AUTHZID );
 810
 811         /* FIXME: empty DN in proxyAuthz control should be legal... */
 812         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 813                 if ( dn.bv_val ) {
 814                         ch_free( dn.bv_val );
 815                 }
 816                 rs->sr_text = "authzId mapping failed";
 817                 return LDAP_PROXY_AUTHZ_FAILURE;
 818         }
 819
 820         Debug( LDAP_DEBUG_TRACE,
 821                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 822                 op->o_connid,
 823                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 824
 825         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 826
 827         if ( rc ) {
 828                 ch_free( dn.bv_val );
 829                 rs->sr_text = "not authorized to assume identity";
 830                 return LDAP_PROXY_AUTHZ_FAILURE;
 831         }
 832
 833         ch_free( op->o_ndn.bv_val );
 834         ch_free( op->o_dn.bv_val );
 835
 836         /*
 837          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 838          * from now on op->o_dn is normalized
 839          */
 840         op->o_ndn = dn;
 841         ber_dupbv( &op->o_dn, &dn );
 842
 843
 844         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 845             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 846
 847         return LDAP_SUCCESS;
 848 }
 849
 850 static int parseNoOp (
 851         Operation *op,
 852         SlapReply *rs,
 853         LDAPControl *ctrl )
 854 {
 855         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 856                 rs->sr_text = "noop control specified multiple times";
 857                 return LDAP_PROTOCOL_ERROR;
 858         }
 859
 860         if ( ctrl->ldctl_value.bv_len ) {
 861                 rs->sr_text = "noop control value not empty";
 862                 return LDAP_PROTOCOL_ERROR;
 863         }
 864
 865         op->o_noop = ctrl->ldctl_iscritical
 866                 ? SLAP_CONTROL_CRITICAL
 867                 : SLAP_CONTROL_NONCRITICAL;
 868
 869         return LDAP_SUCCESS;
 870 }
 871
 872 static int parsePagedResults (
 873         Operation *op,
 874         SlapReply *rs,
 875         LDAPControl *ctrl )
 876 {
 877         int             rc = LDAP_SUCCESS;
 878         ber_tag_t       tag;
 879         ber_int_t       size;
 880         BerElement      *ber;
 881         struct berval   cookie = BER_BVNULL;
 882         PagedResultsState       *ps;
 883
 884         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 885                 rs->sr_text = "paged results control specified multiple times";
 886                 return LDAP_PROTOCOL_ERROR;
 887         }
 888
 889         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 890                 rs->sr_text = "paged results control value is empty (or absent)";
 891                 return LDAP_PROTOCOL_ERROR;
 892         }
 893
 894         /* Parse the control value
 895          *      realSearchControlValue ::= SEQUENCE {
 896          *              size    INTEGER (0..maxInt),
 897          *                              -- requested page size from client
 898          *                              -- result set size estimate from server
 899          *              cookie  OCTET STRING
 900          * }
 901          */
 902         ber = ber_init( &ctrl->ldctl_value );
 903         if ( ber == NULL ) {
 904                 rs->sr_text = "internal error";
 905                 return LDAP_OTHER;
 906         }
 907
 908         tag = ber_scanf( ber, "{im}", &size, &cookie );
 909
 910         if ( tag == LBER_ERROR ) {
 911                 rs->sr_text = "paged results control could not be decoded";
 912                 rc = LDAP_PROTOCOL_ERROR;
 913                 goto done;
 914         }
 915
 916         if ( size < 0 ) {
 917                 rs->sr_text = "paged results control size invalid";
 918                 rc = LDAP_PROTOCOL_ERROR;
 919                 goto done;
 920         }
 921
 922 #if 0
 923         /* defer cookie decoding/checks to backend... */
 924         if ( cookie.bv_len ) {
 925                 PagedResultsCookie reqcookie;
 926                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 927                         /* bad cookie */
 928                         rs->sr_text = "paged results cookie is invalid";
 929                         rc = LDAP_PROTOCOL_ERROR;
 930                         goto done;
 931                 }
 932
 933                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 934
 935                 if ( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 936                         /* bad cookie */
 937                         rs->sr_text = "paged results cookie is invalid";
 938                         rc = LDAP_PROTOCOL_ERROR;
 939                         goto done;
 940
 941                 } else if ( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 942                         rs->sr_text = "paged results cookie is invalid or old";
 943                         rc = LDAP_UNWILLING_TO_PERFORM;
 944                         goto done;
 945                 }
 946
 947         } else {
 948                 /* Initial request.  Initialize state. */
 949 #if 0
 950                 if ( op->o_conn->c_pagedresults_state.ps_cookie != 0 ) {
 951                         /* There's another pagedResults control on the
 952                          * same connection; reject new pagedResults controls
 953                          * (allowed by RFC2696) */
 954                         rs->sr_text = "paged results cookie unavailable; try later";
 955                         rc = LDAP_UNWILLING_TO_PERFORM;
 956                         goto done;
 957                 }
 958 #endif
 959                 op->o_pagedresults_state.ps_cookie = 0;
 960                 op->o_pagedresults_state.ps_count = 0;
 961         }
 962 #endif
 963
 964         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
 965         *ps = op->o_conn->c_pagedresults_state;
 966         ps->ps_size = size;
 967         op->o_pagedresults_state = ps;
 968
 969         /* NOTE: according to RFC 2696 3.:
 970
 971     If the page size is greater than or equal to the sizeLimit value, the
 972     server should ignore the control as the request can be satisfied in a
 973     single page.
 974
 975          * NOTE: this assumes that the op->ors_slimit be set
 976          * before the controls are parsed.
 977          */
 978
 979         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 980                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
 981
 982         } else if ( ctrl->ldctl_iscritical ) {
 983                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
 984
 985         } else {
 986                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
 987         }
 988
 989 done:;
 990         (void)ber_free( ber, 1 );
 991         return rc;
 992 }
 993
 994 #ifdef LDAP_DEVEL
 995 static int parseSortedResults (
 996         Operation *op,
 997         SlapReply *rs,
 998         LDAPControl *ctrl )
 999 {
1000         int             rc = LDAP_SUCCESS;
1001
1002         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1003                 rs->sr_text = "sorted results control specified multiple times";
1004                 return LDAP_PROTOCOL_ERROR;
1005         }
1006
1007         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1008                 rs->sr_text = "sorted results control value is empty (or absent)";
1009                 return LDAP_PROTOCOL_ERROR;
1010         }
1011
1012         /* blow off parsing the value */
1013
1014         op->o_sortedresults = ctrl->ldctl_iscritical
1015                 ? SLAP_CONTROL_CRITICAL
1016                 : SLAP_CONTROL_NONCRITICAL;
1017
1018         return rc;
1019 }
1020 #endif
1021
1022 static int parseAssert (
1023         Operation *op,
1024         SlapReply *rs,
1025         LDAPControl *ctrl )
1026 {
1027         BerElement      *ber;
1028         struct berval   fstr = BER_BVNULL;
1029         const char *err_msg = "";
1030
1031         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1032                 rs->sr_text = "assert control specified multiple times";
1033                 return LDAP_PROTOCOL_ERROR;
1034         }
1035
1036         if ( ctrl->ldctl_value.bv_len == 0 ) {
1037                 rs->sr_text = "assert control value is empty (or absent)";
1038                 return LDAP_PROTOCOL_ERROR;
1039         }
1040
1041         ber = ber_init( &(ctrl->ldctl_value) );
1042         if (ber == NULL) {
1043                 rs->sr_text = "assert control: internal error";
1044                 return LDAP_OTHER;
1045         }
1046
1047         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion), &rs->sr_text);
1048
1049         if( rs->sr_err != LDAP_SUCCESS ) {
1050                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1051                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1052                         send_ldap_disconnect( op, rs );
1053                         rs->sr_err = SLAPD_DISCONNECT;
1054                 } else {
1055                         send_ldap_result( op, rs );
1056                 }
1057                 if( op->o_assertion != NULL ) {
1058                         filter_free_x( op, op->o_assertion );
1059                 }
1060                 return rs->sr_err;
1061         }
1062
1063 #ifdef LDAP_DEBUG
1064         filter2bv_x( op, op->o_assertion, &fstr );
1065
1066         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1067                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1068         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1069 #endif
1070
1071         op->o_assert = ctrl->ldctl_iscritical
1072                 ? SLAP_CONTROL_CRITICAL
1073                 : SLAP_CONTROL_NONCRITICAL;
1074
1075         rs->sr_err = LDAP_SUCCESS;
1076         return LDAP_SUCCESS;
1077 }
1078
1079 static int parsePreRead (
1080         Operation *op,
1081         SlapReply *rs,
1082         LDAPControl *ctrl )
1083 {
1084         ber_len_t siz, off, i;
1085         AttributeName *an = NULL;
1086         BerElement      *ber;
1087
1088         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1089                 rs->sr_text = "preread control specified multiple times";
1090                 return LDAP_PROTOCOL_ERROR;
1091         }
1092
1093         if ( ctrl->ldctl_value.bv_len == 0 ) {
1094                 rs->sr_text = "preread control value is empty (or absent)";
1095                 return LDAP_PROTOCOL_ERROR;
1096         }
1097
1098         ber = ber_init( &(ctrl->ldctl_value) );
1099         if (ber == NULL) {
1100                 rs->sr_text = "preread control: internal error";
1101                 return LDAP_OTHER;
1102         }
1103
1104         siz = sizeof( AttributeName );
1105         off = offsetof( AttributeName, an_name );
1106         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1107                 rs->sr_text = "preread control: decoding error";
1108                 return LDAP_PROTOCOL_ERROR;
1109         }
1110
1111         for( i=0; i<siz; i++ ) {
1112                 int             rc = LDAP_SUCCESS;
1113                 const char      *dummy = NULL;
1114
1115                 an[i].an_desc = NULL;
1116                 an[i].an_oc = NULL;
1117                 an[i].an_oc_exclude = 0;
1118                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1119                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1120                         rs->sr_text = dummy
1121                                 ? dummy
1122                                 : "postread control: unknown attributeType";
1123                         return rc;
1124                 }
1125         }
1126
1127         op->o_preread = ctrl->ldctl_iscritical
1128                 ? SLAP_CONTROL_CRITICAL
1129                 : SLAP_CONTROL_NONCRITICAL;
1130
1131         op->o_preread_attrs = an;
1132
1133         rs->sr_err = LDAP_SUCCESS;
1134         return LDAP_SUCCESS;
1135 }
1136
1137 static int parsePostRead (
1138         Operation *op,
1139         SlapReply *rs,
1140         LDAPControl *ctrl )
1141 {
1142         ber_len_t siz, off, i;
1143         AttributeName *an = NULL;
1144         BerElement      *ber;
1145
1146         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1147                 rs->sr_text = "postread control specified multiple times";
1148                 return LDAP_PROTOCOL_ERROR;
1149         }
1150
1151         if ( ctrl->ldctl_value.bv_len == 0 ) {
1152                 rs->sr_text = "postread control value is empty (or absent)";
1153                 return LDAP_PROTOCOL_ERROR;
1154         }
1155
1156         ber = ber_init( &(ctrl->ldctl_value) );
1157         if (ber == NULL) {
1158                 rs->sr_text = "postread control: internal error";
1159                 return LDAP_OTHER;
1160         }
1161
1162         siz = sizeof( AttributeName );
1163         off = offsetof( AttributeName, an_name );
1164         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1165                 rs->sr_text = "postread control: decoding error";
1166                 return LDAP_PROTOCOL_ERROR;
1167         }
1168
1169         for( i=0; i<siz; i++ ) {
1170                 int             rc = LDAP_SUCCESS;
1171                 const char      *dummy = NULL;
1172
1173                 an[i].an_desc = NULL;
1174                 an[i].an_oc = NULL;
1175                 an[i].an_oc_exclude = 0;
1176                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1177                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1178                         rs->sr_text = dummy
1179                                 ? dummy
1180                                 : "postread control: unknown attributeType";
1181                         return rc;
1182                 }
1183         }
1184
1185         op->o_postread = ctrl->ldctl_iscritical
1186                 ? SLAP_CONTROL_CRITICAL
1187                 : SLAP_CONTROL_NONCRITICAL;
1188
1189         op->o_postread_attrs = an;
1190
1191         rs->sr_err = LDAP_SUCCESS;
1192         return LDAP_SUCCESS;
1193 }
1194
1195 int parseValuesReturnFilter (
1196         Operation *op,
1197         SlapReply *rs,
1198         LDAPControl *ctrl )
1199 {
1200         BerElement      *ber;
1201         struct berval   fstr = BER_BVNULL;
1202         const char *err_msg = "";
1203
1204         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1205                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1206                 return LDAP_PROTOCOL_ERROR;
1207         }
1208
1209         if ( ctrl->ldctl_value.bv_len == 0 ) {
1210                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1211                 return LDAP_PROTOCOL_ERROR;
1212         }
1213
1214         ber = ber_init( &(ctrl->ldctl_value) );
1215         if (ber == NULL) {
1216                 rs->sr_text = "internal error";
1217                 return LDAP_OTHER;
1218         }
1219
1220         rs->sr_err = get_vrFilter( op, ber, (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1221
1222         if( rs->sr_err != LDAP_SUCCESS ) {
1223                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1224                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1225                         send_ldap_disconnect( op, rs );
1226                         rs->sr_err = SLAPD_DISCONNECT;
1227                 } else {
1228                         send_ldap_result( op, rs );
1229                 }
1230                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1231         }
1232 #ifdef LDAP_DEBUG
1233         else {
1234                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1235         }
1236
1237         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1238                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1239         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1240 #endif
1241
1242         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1243                 ? SLAP_CONTROL_CRITICAL
1244                 : SLAP_CONTROL_NONCRITICAL;
1245
1246         rs->sr_err = LDAP_SUCCESS;
1247         return LDAP_SUCCESS;
1248 }
1249
1250 #ifdef LDAP_CONTROL_SUBENTRIES
1251 static int parseSubentries (
1252         Operation *op,
1253         SlapReply *rs,
1254         LDAPControl *ctrl )
1255 {
1256         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1257                 rs->sr_text = "subentries control specified multiple times";
1258                 return LDAP_PROTOCOL_ERROR;
1259         }
1260
1261         /* FIXME: should use BER library */
1262         if( ( ctrl->ldctl_value.bv_len != 3 )
1263                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1264                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1265         {
1266                 rs->sr_text = "subentries control value encoding is bogus";
1267                 return LDAP_PROTOCOL_ERROR;
1268         }
1269
1270         op->o_subentries = ctrl->ldctl_iscritical
1271                 ? SLAP_CONTROL_CRITICAL
1272                 : SLAP_CONTROL_NONCRITICAL;
1273
1274         if (ctrl->ldctl_value.bv_val[2]) {
1275                 set_subentries_visibility( op );
1276         }
1277
1278         return LDAP_SUCCESS;
1279 }
1280 #endif
1281
1282 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1283 static int parsePermissiveModify (
1284         Operation *op,
1285         SlapReply *rs,
1286         LDAPControl *ctrl )
1287 {
1288         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1289                 rs->sr_text = "permissiveModify control specified multiple times";
1290                 return LDAP_PROTOCOL_ERROR;
1291         }
1292
1293         if ( ctrl->ldctl_value.bv_len ) {
1294                 rs->sr_text = "permissiveModify control value not empty";
1295                 return LDAP_PROTOCOL_ERROR;
1296         }
1297
1298         op->o_permissive_modify = ctrl->ldctl_iscritical
1299                 ? SLAP_CONTROL_CRITICAL
1300                 : SLAP_CONTROL_NONCRITICAL;
1301
1302         return LDAP_SUCCESS;
1303 }
1304 #endif
1305
1306 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1307 static int parseDomainScope (
1308         Operation *op,
1309         SlapReply *rs,
1310         LDAPControl *ctrl )
1311 {
1312         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1313                 rs->sr_text = "domainScope control specified multiple times";
1314                 return LDAP_PROTOCOL_ERROR;
1315         }
1316
1317         if ( ctrl->ldctl_value.bv_len ) {
1318                 rs->sr_text = "domainScope control value not empty";
1319                 return LDAP_PROTOCOL_ERROR;
1320         }
1321
1322         op->o_domain_scope = ctrl->ldctl_iscritical
1323                 ? SLAP_CONTROL_CRITICAL
1324                 : SLAP_CONTROL_NONCRITICAL;
1325
1326         return LDAP_SUCCESS;
1327 }
1328 #endif
1329
1330 #ifdef SLAP_CONTROL_X_TREE_DELETE
1331 static int parseTreeDelete (
1332         Operation *op,
1333         SlapReply *rs,
1334         LDAPControl *ctrl )
1335 {
1336         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1337                 rs->sr_text = "treeDelete control specified multiple times";
1338                 return LDAP_PROTOCOL_ERROR;
1339         }
1340
1341         if ( ctrl->ldctl_value.bv_len ) {
1342                 rs->sr_text = "treeDelete control value not empty";
1343                 return LDAP_PROTOCOL_ERROR;
1344         }
1345
1346         op->o_tree_delete = ctrl->ldctl_iscritical
1347                 ? SLAP_CONTROL_CRITICAL
1348                 : SLAP_CONTROL_NONCRITICAL;
1349
1350         return LDAP_SUCCESS;
1351 }
1352 #endif
1353
1354 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
1355 static int parseSearchOptions (
1356         Operation *op,
1357         SlapReply *rs,
1358         LDAPControl *ctrl )
1359 {
1360         BerElement *ber;
1361         ber_int_t search_flags;
1362         ber_tag_t tag;
1363
1364         if ( ctrl->ldctl_value.bv_len == 0 ) {
1365                 rs->sr_text = "searchOptions control value not empty";
1366                 return LDAP_PROTOCOL_ERROR;
1367         }
1368
1369         ber = ber_init( &ctrl->ldctl_value );
1370         if( ber == NULL ) {
1371                 rs->sr_text = "internal error";
1372                 return LDAP_OTHER;
1373         }
1374
1375         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1376                 rs->sr_text = "searchOptions control decoding error";
1377                 return LDAP_PROTOCOL_ERROR;
1378         }
1379
1380         (void) ber_free( ber, 1 );
1381
1382         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1383                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1384                         rs->sr_text = "searchOptions control specified multiple times "
1385                                 "or with domainScope control";
1386                         return LDAP_PROTOCOL_ERROR;
1387                 }
1388
1389                 op->o_domain_scope = ctrl->ldctl_iscritical
1390                         ? SLAP_CONTROL_CRITICAL
1391                         : SLAP_CONTROL_NONCRITICAL;
1392         }
1393
1394         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1395                 /* Other search flags not recognised so far,
1396                  * including:
1397                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1398                  */
1399                 rs->sr_text = "searchOptions contained unrecongized flag";
1400                 return LDAP_UNWILLING_TO_PERFORM;
1401         }
1402
1403         return LDAP_SUCCESS;
1404 }
1405 #endif
1406